add test deps

Author: twishabansal

packages/toolbox-core/pyproject.toml

@@ -37,12 +37,13 @@ Repository = "https://github.com/googleapis/genai-toolbox-langchain-python.git"
 "Bug Tracker" = "https://github.com/googleapis/genai-toolbox-langchain-python/issues"
 Changelog = "https://github.com/googleapis/genai-toolbox-langchain-python/blob/main/packages/toolbox-core/CHANGELOG.md"
 
-# TODO: Add test deps
 [project.optional-dependencies]
 test = [
+    "black[jupyter]==25.1.0",
+    "isort==6.0.1",
+    "mypy==1.15.0",
     "pytest==8.3.5",
 ]
-
 [build-system]
 requires = ["setuptools"]
 build-backend = "setuptools.build_meta"